Ordinary electric wall-switch



M. E. CALLEGARIS.

ORDINARY ELECTRIC WALL SWITCH.

APPLICATION FILED rams, 1919.

1,33 1,955 Patented Feb. 24,1920.

. /'rea flea/aria Q/ya is UNITED STATES PATENT OFFICE.

' MARCO EVERARDO CALLEGABIS, OF MILAN, ITALY.

ORDINARY ELECTRIC WALL-SWITCH.

To all whom it may concern:

Be it known that I, MARCO EVERARDO CA1;- LEGARIS, manufacturer, of Milan, Italy, 'Via Lulli 14, have invented certain new and useful Improvements in Ordinary Electric Wall-Switches, of which the following is a specification.

The invention relates to electric switches of the type generally used in connection with light-installations and fixed against. walls. The invention has for its object a new construction of switches inexpensive to produce both from the ,point of view of material used and workmanship required;

With this end in view the switch comprises parts out out of plates to suitable shape, and capable ofbeing worked in a cold state, without the use of special tools.

In the annexed drawing one embodiment of the invention is shown.

Figure 1 is a cross section through the switch center-line,

Fig. 2 is an inverted plan view of same.

The' switch comprises a body 1 of insulating material, formed with a cavity composed of three cylinders 161718- of decreasing diameter.

The middle cylinder has diametrically opposed wall recesses -19-. 20 is a hole through the center of the body allowmg passage of a spindle or equivalent, -2,

said spindle being formed from a plate folded on itself.

The upper end of said spindle is provided with a key --3- and the lower end is shaped into arms 4. a

On said arms seat the forked ends of a U-shaped member 5, formed, with a plate, said member forming an enlargement of the spindle and resting against bladesprings -6 mounted transversely of the upper cylinder cavity 18-. j The springs 6 act as a detent to yieldingly hold the memher 5 in either of its positions.

Between arms --4 and the bottom of cylinder cavity -17- are arranged the following members:

A metal disk 4'--- on which seats coil spring 15 a metal butterfly-plate -bhaving a'eentral ,square aperture in which the member 5 fits, said plate carrying wings 14'and resting on said spring, and an insulating disk plate --12-, carrying contact plates o-, said plates on cross disk 12, being folded down at 7, and further being provided with extensions 9- lodged Patented Feb. 24, 1920.

Application filed March 8, 1919. Serial No. 281,497.

in recesses 19-. Plate 12 has a central circular aperture of suiiicient diameter to permit member 5 to rotate freely therein, while extensions 9 depending from said plate revent any angular movement of said plate. The ends of said extension are pliable and constitute the terminals of the switch; the ends of the line-wire are coiled on said ends, and the latter are folded up to grip said wires, as shown in dotted lines in Fig. 1.

8 is another insulating disk plate inserted between the bottom of cylinder cavity and -12.

All the members mentioned are pressed against the body by spring -15--.

The operation of the switch is as follows: In the position shown the circuit between terminals -+9 is closed through butterfly plate -b.

Upon spindle -2- being turned through 90, butterfly b will be rotated and the wings 14- brought on insulating disk -12- thereby opening the circuit.

The square section of member --5- resting between blade spring -6- is snapped at every quarter turn. Disks 12- and 8 have circular central holes, and do not take part in the rotation. Furthermore, disk -l2 would be stopped in any movementcaused by friction, by the plates --9 engaging in recesses 19-.

What I claim is:

1. A wall switchcomprising a body formed with a plurality of cylindrical cavities with upwardly decreasing diameter, and

' a. central hole; a spindle equivalent in-said pliable terminals, and laminated springs to snap said, forked member. 4

2. A. wall switch comprising a body formed with a plurality of cylindrical cavities with upwardly decreasing diameter, and a'central hole; a spindle equivalent in said hole, with a key at one end and two arms'at the other end, a forked member fitted on said spindle and seating on said arms, an insulatin g disk, a butterfly plate on said spindle with wings forming part of thebutterfly plate sliding over said insulating disk, a coil spring inserted between said spindle arms and said butterfly plate, two contact plates on said disk, with projecting pliable terminals, and laminated springs to snap said forked member.

3. A wall switch comprising a body formed with a plurality of cylindrical cavities with upwardly decreasing diameter, and a central hole; a spindle equivalent in said hole, with a key at one end and two arms at the other end, a forked member fitted on said spindle and seating on said arms, a metal disk on said arms, an insulating disk, a butterfly plate on said spindle with wings forming part of the butterfly plate sliding over ber, and an insulating disk between said;

laminated springs and said contact-plates carrying disk.

In testimony whereof I aflix my signature, in presence of two witnesses.

MARCO EVERARDO OALLEGARIS.

TWitnesses:

GIAN GIACQMO GUARNE'ro, G. P. Wilson. 

